package com.ddyx.gateway.swagger;

import com.ddyx.gateway.swagger.props.RouteProperties;
import com.ddyx.gateway.swagger.props.RouteResource;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.config.GatewayProperties;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;
import springfox.documentation.swagger.web.SwaggerResource;
import springfox.documentation.swagger.web.SwaggerResourcesProvider;

import java.util.ArrayList;
import java.util.List;

/**
 * @author Sywd
 */
@Slf4j
@Component
@Primary
@AllArgsConstructor
public class SwaggerProvider implements SwaggerResourcesProvider {
	public static final String API_URI = "/v2/api-docs";
	private final RouteLocator routeLocator;
	private final GatewayProperties gatewayProperties;

	/**
	 * 方案1，可以正常配置swagger多模块聚合文档
	 */
	/*@Override
	public List<SwaggerResource> get() {
		List<SwaggerResource> resources = new ArrayList<>();
		List<String> routes = new ArrayList<>();
		routeLocator.getRoutes().subscribe(route -> routes.add(route.getId()));
		gatewayProperties.getRoutes().stream().filter(routeDefinition -> routes.contains(routeDefinition.getId()))
				.forEach(routeDefinition -> routeDefinition.getPredicates().stream()
						.filter(predicateDefinition -> ("Path").equalsIgnoreCase(predicateDefinition.getName()))
						.forEach(predicateDefinition -> resources.add(swaggerResource(routeDefinition.getId(),
								predicateDefinition.getArgs().get(NameUtils.GENERATED_NAME_PREFIX + "0")
										.replace("/**", API_URI)))));
		return resources;
	}

	private SwaggerResource swaggerResource(String name, String location) {
		log.info("name=" + name);
		log.info("location=" + location);
		SwaggerResource swaggerResource = new SwaggerResource();
		swaggerResource.setName(name);
		swaggerResource.setLocation(location);
		swaggerResource.setSwaggerVersion("2.0");
		return swaggerResource;
	}*/


	/**
	 * 方案2，可以正常配置swagger多模块聚合文档
	 */
	private RouteProperties routeProperties;

	@Override
	public List<SwaggerResource> get() {
		List<SwaggerResource> resources = new ArrayList<>();
		List<RouteResource> routeResources = routeProperties.getResources();
		routeResources.forEach(routeResource -> resources.add(swaggerResource(routeResource)));
		return resources;
	}

	private SwaggerResource swaggerResource(RouteResource routeResource) {
		SwaggerResource swaggerResource = new SwaggerResource();
		swaggerResource.setName(routeResource.getName());
		swaggerResource.setLocation(routeResource.getLocation().concat(API_URI));
		swaggerResource.setSwaggerVersion("2.0");
		return swaggerResource;
	}
}
